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Choose the right countersink angle, body diameter, and number of flutes for your application.
Drill-Bit Countersinks for Wood and Plastic
High-Speed Steel
 |
4 Flutes |
The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.
Countersinks | Counterbore Collars | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||||||
Body Dia. | For Drill Bit Size | For Screw Size | Overall Lg. | Mfr. | Each | OD | Wd. | Each | ||||
4 Flutes | ||||||||||||
82° Countersink Angle | ||||||||||||
| 3/8" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A17 | 000000 | 5/8" | 1/4" | 2903A13 | 00000 | ||
| 1/2" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A27 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 5/8" | 3/16" | No. 9 | 1 1/16" | W. L. Fuller | 2910A23 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
90° Countersink Angle | ||||||||||||
| 3/8" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A77 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 1/2" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A87 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 5/8" | 3/16" | No. 9 | 1 1/16" | W. L. Fuller | 2910A83 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
Carbon Steel
|
4 Flutes |
Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.
Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.
Countersinks | Counterbore Collars | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||||||
Body Dia. | For Drill Bit Size | For Screw Size | Overall Lg. | Mfr. | Each | OD | Wd. | Each | ||||
4 Flutes | ||||||||||||
82° Countersink Angle | ||||||||||||
| 3/8" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2785A25 | 00000 | 5/8" | 1/4" | 2903A13 | 00000 | ||
| 1/2" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2785A37 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 5/8" | 3/16" | No. 9 | 1 1/16" | W. L. Fuller | 2785A53 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
